The Proximus PTT app requires a modern iPhone or Android smartphone – possibly an enhanced model – with a Proximus data subscription. The communication takes place not over the radio network but over the 3G/4G network or Wi-Fi. This makes it possible, for example, to make a call to several building sites at the same time that could not be reached using a standard walkie-talkie.Consequently, there is no longer any need to set up signal-strengthening antennae on building sites.
Calls are free within the data limit. If the system is used intensively for at least eight hours a day, 200 MB per month is sufficient. Push-to-Talk is available as a basic version or a professional version. With the latter, communication groups can be managed centrally and users can be located on a map. Supervisors can even take control of a conversation.
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